Liquefied air separation FAQ

Influence of Seal Leakage of Centrifugal Compressor on Compressor Performance

What are the characteristics of the structure of centrifugal air compressor in air separation plant

The distillation column is an air separation equipment equipped with multi-layer tower plates (the working principles of the sieve Tower and the packing tower are the same. There is a liquid layer with a certain thickness on the tower plate. The distillation column is usually a two-stage distillation column, which is divided into two parts: the upper tower and the lower tower. Compressed air is sent to the lower part of the lower tower as the rising air after the moisture and carbon dioxide are cleared and cooled and expanded in the heat exchanger (the medium pressure process. Because it contains 21% oxygen, the corresponding saturation temperature is 100.05K at 0.6MPa. The liquid nitrogen condensing in the condensing evaporator flows down from the top of the lower tower as the recirculation liquid. Because the oxygen content is 0.01% ~ 1%, the saturation temperature at 0.6MPa is about 96.3 K. Thus it can be seen that the rising steam temperature at the bottom of the distillation to...

Evaluation of steel weldability

Precautions for installation of pipelines in air separation tower

Prevention of Condensation Evaporator in Air Separation Plant

Condensation temperature of oxygen nitrogen mixture

Make use of the difference of the volatile capacity of each component in the mixture, through the reflux of liquid and gas, make the gas and liquid two reverse multi-stage contact, under the constraint of the relationship of thermal energy driving and phase equilibrium, it makes volatile components (light components) transfer continuously from the liquid phase to the gas phase, while the volatile components migrate from the gas phase to the liquid phase, which makes the mixture separate continuously. This process is called rectification. In this process, the process of heat transfer and mass transfer is carried out at the same time, which belongs to the control of mass transfer process. Raw materials enter the tower from the appropriate position in the middle of the tower, and divide the tower into two sections. The upper section is the distillation section without feed, and the lower section contains feed plate as the retention section. The condenser provides liquid reflux from the...

What are the classification and manufacturing methods of copper tubes for oxygen pipelines of air separation plants

During the process of storage and transportation, the liquid storage tank should pay attention to: 1) the protective equipment and instrument of the storage tank should be in good condition; 2) during the process of storage and transportation, the storage tank should be well ventilated, and inflammable substances should not be stored around, no fire; 3) the filling rate of the storage tank is less than 95%, and it is forbidden to overfill or overpressure; 4) when there is liquid in the storage tank, it is forbidden to repair it by fire; 5) the equipment pipeline should be heated slowly when thawing, and do not freeze with overheated working medium or open fire; 6) wear protective gloves when contacting low temperature liquid to avoid direct contact between skin and low temperature liquid; 7) the transportation process should be smooth, and there should be no big bumps.

No matter in the starting working condition or in the normal operating condition, medium-voltage small air separation plant must pay great attention to the relationship between the working pressure of the process and the flow and expansion. The relationship between them should meet two conditions: one is to ensure the heat balance of the whole device and meet the demand of the equipment for cooling capacity; the second is to ensure that the second heat exchanger of the cold end of the main heat exchanger can work normally. The working pressure of the air separation plant will directly affect the isotherm throttling effect of high pressure air and the cooling capacity of the expansion machine. That is to say, in order to ensure the normal operation of the air separation plant, when the high pressure changes, the distribution ratio of the flow and expansion volume should be adjusted timely. If the operating pressure of the air separation plant rises, the isotherm throttling effect and...

How to operate and manage the rectification tower of air separation equipment